<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>mutation flashing test</title>
</head>
<body>
  <div id="root">
    <ul class="list">
      <li class="item">item</li>
      <li class="item">item</li>
    </ul>
  </div>
</body>
</html>